#coding:utf8
import re
import urllib.parse

from bs4 import  BeautifulSoup

class HtmlParser(object):
    def parse(self,page_url,html_cont):
        if page_url is None or html_cont is None:
            return
        soup=BeautifulSoup(html_cont,'html.parser',from_encoding='utf-8')
        new_urls=self._get_new_urls(page_url,soup)
        new_data=self._get_new_data(page_url,soup)
        return new_urls,new_data
    #获取出来链接放入新URL库
    def _get_new_urls(self,page_url,soup):
        new_urls=set()
        links=soup.find_all('a',href=re.compile(r"/item/"))
        for link in links:
            new_url=link['href']
            new_full_url=urllib.parse.urljoin(page_url,new_url)
            new_urls.add(new_full_url)
        return  new_urls

#<dd class="lemmaWgt-lemmaTitle-title"><h1>Python</h1>
#获取新的内容
    def _get_new_data(self,page_url,soup):
        res_data={}
        res_data['url']=page_url
        title_node=soup.find('dd',class_='lemmaWgt-lemmaTitle-title').find('h1')
        res_data['title']=title_node.get_text()
        summary_node=soup.find('div',class_="lemma-summary")
        res_data['summary']=summary_node.get_text()
        return  res_data
